Heat-insulated cooker.



H. BIENUTTA, G. PISGHBAGH 6L G. ZIGAHN.

lHEAT INSULATED GOOKER.

APPLICATION FILED APR. 1B, 1911. A

Patented 0G13. 15, 1912.

Invenur;

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HANS BIENUTTA, GUSTAV FISCI-IBACH, AND CARL ZIGrAI-IN, 0F LYCK, GERMANY.

4 4HE.AT-INSULATEI) COOKER.

T0 all whom', t may concern:

Be it known that we, HANS BIENUTTA, G'Us'rav FisoHBAoH, and CARL ZIGAHN,subjects of the German Emperor, and residing at Lyck, East Prussia,Germany, have in vented certain new and useful Improvements inHeat-Insulated Cookers, of which the following is a specication.

Our invention relates to a cooker made in such manner that when it hasbeen taken the same.

Some illustrative embodiments of our invention are represented by way ofexample in the accompanying drawing, wherein Figure l is a perspectiveview and Fig. Q, a vertical section showing one form of our cooker; Fig.8 shows another form of our cooker in vertical section, on a smallerscale, comprising two pot-s in an outer casing, and Fig t is a plan ofthe latter form after the lid has been removed; Fig. 5 is a plan ofanother form of our cooker comprising three pots, the lid having beenremoved, and Fig. 6 is a like View of another form comprising four pots.

Referring firstly to Figs. 1 and Q, our cooker comprises three parts:-the pot proper a for the food, the outer casing b containing the pot aand covered by the lid c. The pot a is preferably stamped in one pieceout of suitable material, e. g., sheet iron, and subsequently enameled.The casing b has double walls and, with the exception of a hole aipreferably closed by a screw or cap, is completely closed. Between itswalls is insulation consisting of bad conductors of heat, c. g. silica,either alone or mixed with powdered cork, mica or asbestos, Wepreferably make the casing Z) of tinned sheet metal or sheet iron. Thelower edges of its two walls are folded together so that an inwardlyprojecting fold or ledge c is made on which the pot a rests, so that thelatter cannot fall through the outer casing b. Handles 7 are attached tothe casing b. The lid c is also made with two walls and is Specificationof Letters 1fatent.

Patented Oct. i5, i912.

Application filed April 18, 1911. Serial No. 621,961.

filled with insulation. The lid is completely closed with the exceptionof a hole h preferably closed by a screw or cap. The upper edge z' isformed by folding the edges of the two walls of the lid together to forma projecting rim which rests in such manner on the top edge of thecasing that a tight closure is obtained between the lid and theprojecting upper edges of the pot a on the one hand and between the lidand the casing b on the other hand.

Our cooker is used as follows r-After food has been put into the pot aand the latter has been placed into the casing b, the cooker is placedon the fire, and after the food has been raised to the boiling point, itis allowed to boil for five to twenty minutes longer according to thenature of the food. The lid is then placed firmly on the pot, and theentire pot is taken from the tire and placed on a plate of asbestos,felt or the like. Owing to the casing Y) having been exposed to the fireand to the insulation having become hot and to the latter remaininghotfor a long time, the food continues to boil after being removed fromthe fire without there being any fear of its being burned.

By using our improved cooker not only is fuel saved, but also time,because the food boils further automatically, so that the cook can beoccupied with other matters during this time. It is not necessary tocover the cooker with cloths or the like in order to retain the heat init. The preparation of food in our cooker has the additional advantagethat, c. g., in the case of soups and gravies, after the pot has beenremoved from the fire, the contents are not diminished, so thatsubsequent pouring in of water, milk, cream and the like which woulddilute the food and take the strength from it, is not necessary.

Referring now to Figs. 3 to 6, instead of one pot a, two of them al, a2or three of them c3, a4, a5 or more may be provided in the outer basingThe individual pots al, a2 are of such a shape that in each case theirtotal section lls up the inside section of the vessel Y), as clearlyshown. The employment of a plurality of pots in one outer casing enablesvarious foods to be prepared simultaneously, for example, the variouscourses of a meal, such as soup, fish, vegetables, roast meat or thelike. Therefore, not only are vessels saved, but firing also because theindividual pots al, a2 are exposed to the full action of the lire justas the. single pot. As Fig. v8 shows, at the places where the walls ofthe individual pots abut against one another the lid c1 is preferablyprovided with recesses or grooves into which the walls can enter.

V1. A cooker, comprising in combination, a double-walled annular outercasing having an inwardly-projecting ledge at the inner bottoin edgethereof and containing insulation between its walls, a pot forcontaining food resting on the ledge in the casing, and a lid havingdouble walls and lled with insulation tightly closing the top of boththe pot and the outer casing, the upper outer edge of the lid beingformed by folding the edges of the two walls together.

2. A cooker, comprising in combination7 a double-walled'annular Voutercasing havf ing an inwardly-projecting ledge at the Vin-V ner bottomedge thereof and containing insulation between its walls, a pluralityYof pots for containing food resting on the ledge in the casing7 thetotal section of the pots for containing food filling the inside sectionof the outer casing, and a lid having double walls and` filled withinsulation tightly closing the ktop of the pots and the M. HANNKE, F.FRIESE.

VCopies of this patent may be obtained for five cents each, byaddressingV the Gonimssioner of IEatents,

Washington, D. C. Y y

